An addiction expert said she wouldn't rule out marijuana causing the agitation.
"It could have been the strain of marijuana that increases the dopamine in the brain, such as sativa," said Dr. Patricia Junquera, assistant professor at the Department of Psychiatry at the University of Miami Miller School of Medicine.
There are two strains of marijuana called sativa and indica. The sativa increases dopamine and gives you energy while decreasing pain threshold. Indica is a "sleepy high," she explained.
"People don't really know what the amount of either is in each little packet of marijuana," she explained. "And we can't differentiate between the two in the blood, much less in a dead person."
She also suggested that if Eugene had a mental disorder, "the marijuana could have increased even further the dopamine levels and aggravated the situation. So that can't be ruled out."
Welp, I think I'm gonna be sending an angry letter to a certain assistant professor